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  • Title: Three-dimensional shape measurement using a structured light system with dual projectors.
    Author: Jiang C, Lim B, Zhang S.
    Journal: Appl Opt; 2018 May 10; 57(14):3983-3990. PubMed ID: 29791369.
    Abstract:
    This paper introduces a structured light system with two projectors and one camera for three-dimensional (3D) shape measurement to alleviate problems created by a single projector such as the shadow problem. In particular, we developed (1) a system calibration framework that can accurately calibrate each such camera-projector system; (2) a residual error correction method based on the system error function; and (3) a data fusion method utilizing the angle between the projection direction and surface normal. Experimental results demonstrate that the proposed dual-projector structured light system improves the measurement accuracy besides extending the measurement range of a single projector system.
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